On Jan 14, 3:59 pm, "David WE Roberts" wrote:

http://www.energywatersaver.co.uk/st...ometer-review/

This review of a Stovax product says that the thermometer is graded in three
zones:
"The display is very simple, just three zones of operation; Creosote, Best
operation and Too hot. The temperatures are displayed in both Celsius and
Fahrenheit."


that looks neat! £12 odd on amazon

Jim K